Jan Kara <jack@xxxxxxx> writes: > Hello, > > On Sat 25-08-12 17:05:35, Eric W. Biederman wrote: >> Two helper are added dqgetusr and dqgetgrp to allow the quota >> infrastructure to be called with a kuid and a kgid respectively. This >> creates type safe variants of dqget and leads to shorter more >> comprehensible code. > It would look more comprehensible to me to have functions like: > kuid2qown() and kgid2qown() and then call dqget(sb, kuid2qown(attr->uid)) > (see below for qown_t change proposal). The code then at the first look > explains what is going on... Hmm? > >> Place the USRQUOTA and GRPQUOTA defines into enum quota_type. This >> brings with it the ability for the compiler to check that switch >> statements handle every quota type, and the ability to mark which >> values store the type of a quota entry. > OK, makes sense. > >> Add the data type qown_t a union of kuid_t and kgid_t. qown_t is a >> replacement for the implicit union of uid and gid stored in an >> unsigned int that is was used in the quota data structures. Making >> the data type explicit allows the kuid_t and kgid_t type safety to >> propogate more thoroughly through the code, revealing more places >> where uid/gid conversions need be made. > Hum, when we already do this, wouldn't it make more sense to embed quota > type in qown_t? Because with the union thing you have no meaningful way of > accessing that type without having quota type anyway. So having that in a > single structure makes a lot of sense, plus it makes prototypes shorter... > And you have to call make_qown() anyway... So I think there was a reason for having the type separate but I'm not seeing that reason off the top of my head. I think it was filesystems like gfs2 doing weird things. But I tell you want I will play with this and if I can't reproduce find a reason for putting them in one structure I will because there are definitely good reasons for doing that. >> Allong with the data type qown_t comes the helper functions >> qown_eq, from_qown, from_qown_munged, qown_valid, and make_qown. >> >> Update struct dquot dq_id to be a qown_t. >> >> Update the signature of dqget, quota_send_warning, dquot_get_dqblk, >> and dquot_set_dqblk to use enum quota_type and qown_t. >> >> Make minimal changes to gfs2, ocfs2, and xfs to deal with the change >> in quota structures and signatures. The ocfs2 changes are larger than >> most because of the extensive tracing throughout the ocfs2 quota code >> that prints out dq_id. > Otherwise the changes look OK to me, although I didn't check them in > detail yet (as above suggestions will change the code anyway). > > Honza Thanks, Eric -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
